Experimental Study on Preheated Combustion of Pulverized Semi-coke

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	Experimental Study on Preheated Combustion of Pulverized Semi-coke
	Yao Yao 1; Zhu Jianguo 2; Lu Qinggang 2; Zhou Zuxu 1
刊名	JOURNAL OF THERMAL SCIENCE
	2015-07-01
卷号	24 期号:4 页码:370-377
关键词	Pulverized semi-coke Preheated combustion Secondary air nozzle NO emission
英文摘要	In a test rig, pulverized semi-coke was preheated to 850 degrees C in a circulating fluidized bed (CFB) and then combusted at 1100 degrees C in a down-fired combustor (DFC). Experiments were conducted to reveal the effects of three secondary air nozzle cases (co-axial jet, top circular jet and wall circular jet) on the NO emission. The results show that the optimized secondary air nozzle can reduce NO emission. O-2 concentration profile is the major factor affecting NO generation and emission, which is led by the secondary air nozzle. The lower O-2 concentration led to the generation of lower initial NO. The NO emission at the exit of the DFC was reduced from 189 to 92 mg/m(3) (@ 6% O-2) with the decrease of initial generation. The peak of NO at 100 mm below the nozzle should be attributed to the oxidization of NH3 in the syngas, rather than the oxidization of fuel-N in the char. The low and well-distributed O-2 concentration contributes to the reduction of initial NO, which helps to reduce the NO emission. The combustion efficiencies of the cases of the co-axial jet, the top circular jet, and the wall circular jet are 97.88%, 98.94% and 98.74%, respectively.
WOS标题词	Science & Technology ; Physical Sciences ; Technology
类目[WOS]	Thermodynamics ; Engineering, Mechanical
研究领域[WOS]	Thermodynamics ; Engineering
关键词[WOS]	CIRCULATING FLUIDIZED-BED ; HIGH-TEMPERATURE AIR ; NOX EMISSIONS ; COAL COMBUSTION ; NITRIC-OXIDE ; CHAR ; REDUCTION ; OXYGEN ; RELEASE
收录类别	SCI
语种	英语
WOS记录号	WOS:000357442500009
公开日期	2015-12-22
内容类型	期刊论文
源URL	[http://ir.etp.ac.cn/handle/311046/98901]
专题	工程热物理研究所_中国科学院工程热物理所（论文库）_期刊论文（SCI）
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Yao Yao,Zhu Jianguo,Lu Qinggang,et al. Experimental Study on Preheated Combustion of Pulverized Semi-coke[J]. JOURNAL OF THERMAL SCIENCE,2015,24(4):370-377.
APA	Yao Yao,Zhu Jianguo,Lu Qinggang,&Zhou Zuxu.(2015).Experimental Study on Preheated Combustion of Pulverized Semi-coke.JOURNAL OF THERMAL SCIENCE,24(4),370-377.
MLA	Yao Yao,et al."Experimental Study on Preheated Combustion of Pulverized Semi-coke".JOURNAL OF THERMAL SCIENCE 24.4(2015):370-377.